The eggs and embryos had been stored at University Hospitals in a cryopreservation tank equipped with a remote alarm system that should have alerted an employee to any temperature change. But the hospital says the alarm was off, so an alert was never issued when an apparent malfunction caused temperatures in the tank to rise. Because the incident occurdred on a Saturday night when the lab wasn’t staffed, no one noticed the continuing rise in temperature. As a result, the eggs and embryos thawed. The hospital has said it’s unlikely any of them are viable.

In court documents filed Friday, University Hospitals denied liability and stated that in vitro fertilization involves a number of risks and that the patients had signed certain informed consent forms.

“Assisted reproductive treatment, including in vitro fertilization and related services, is individualized and specific to each patient, and carries a number of risks, to which Plaintiffs consented,” it stated in the court document.

It also said that the plaintiffs “were fully advised of the material risks, benefits, and alternatives available for the treatment, and thereafter voluntarily assumed and consented to those risks.”

‘Our future children’

Some of the plaintiffs are women who had cancer and froze their eggs in hopes of having children. One of the plaintiffs had banked her embryos after an ovarian cancer diagnosis. After a second diagnosis, this time of uterine cancer, she had a hysterectomy. She and her husband had decided to store their babies-to-be in a long-term cryopreservation tank at Cleveland’s University Hospitals Fertility Center.

Several families including the Plants turned to legal action. In June, an Ohio judge ordered that a committee oversee the progress of more than 50 lawsuits against University Hospitals.

University Hospitals appeared to attribute what had happened to “another or others” — although it didn’t specify whom that was in the court document.

“Plaintiffs’ alleged injuries and damages, which are denied, may have been caused in whole or in part by the acts and omissions of another or others, whose conduct these answering Defendants had no reason to anticipate and for whose conduct they are and were not responsible.”

The hospital also stated in the documents that it “may have been caused by the operation of nature or by an idiosyncratic reaction and were not due to or caused by any alleged fault, lack of care, negligence, or breach of duty by Defendants.”

A storage tank also malfunctioned at Pacific Fertility Center in San Francisco on March 4, the same day as the incident in Cleveland.